Modem interface unit



FIG 1 is a top, end, side perspective view of a modem interface unitshowing my new design;

FIG. 2 is an end elevational view opposite that shown in FIG. 1 thereof;

FIG. 3 is a side elevational view opposite that shown in FIG. 1 thereof;and

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a top plan view thereof.

The ornamental design for a modem interface unit, as shown anddescribed.